22778690 has 16 divisors (see below), whose sum is σ = 44729280. Its totient is φ = 8283120.

The previous prime is 22778687. The next prime is 22778713. The reversal of 22778690 is 9687722.

It is a super-2 number, since 2×22778690² = 1037737436232200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103430 + ... + 103649.

It is an arithmetic number, because the mean of its divisors is an integer number (2795580).

Almost surely, 2^22778690 is an apocalyptic number.

22778690 is a deficient number, since it is larger than the sum of its proper divisors (21950590).

22778690 is a wasteful number, since it uses less digits than its factorization.

22778690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207097.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 22778690 is about 4772.7025886808. The cubic root of 22778690 is about 283.4716172347.

The spelling of 22778690 in words is "twenty-two million, seven hundred seventy-eight thousand, six hundred ninety".